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arXiv · 2106.00892

Evidence for the decay $\Omega_{c}^{0} \to \pi^+\Omega(2012)^- \to \pi^+ (\bar{K}\Xi)^{-}$

Belle Collaboration·Y. Li·S. S. Tang·S. Jia·C. P. Shen·I. Adachi·H. Aihara·S. Al Said·D. M. Asner·H. Atmacan·V. Aulchenko·T. Aushev·R. Ayad·V. Babu·S. Bahinipati·P. Behera·M. Bessner·T. Bilka·J. Biswal·A. Bozek·M. Bračko·P. Branchini·T. E. Browder·A. Budano·M. Campajola·D. Červenkov·M. -C. Chang·P. Chang·V. Chekelian·A. Chen·B. G. Cheon·K. Chilikin·H. E. Cho·K. Cho·S. -J. Cho·Y. Choi·S. Choudhury·D. Cinabro·S. Cunliffe·S. Das·N. Dash·G. De Nardo·G. De Pietro·F. Di Capua·Z. Doležal·T. V. Dong·D. Epifanov·T. Ferber·B. G. Fulsom·R. Garg·V. Gaur·A. Giri·P. Goldenzweig·B. Golob·E. Graziani·T. Gu·K. Gudkova·C. Hadjivasiliou·S. Halder·K. Hayasaka·H. Hayashii·W. -S. Hou·K. Inami·A. Ishikawa·M. Iwasaki·Y. Iwasaki·W. W. Jacobs·E. -J. Jang·Y. Jin·K. K. Joo·K. H. Kang·G. Karyan·C. Kiesling·C. H. Kim·D. Y. Kim·K. -H. Kim·S. H. Kim·Y. -K. Kim·K. Kinoshita·P. Kodyš·T. Konno·A. Korobov·S. Korpar·E. Kovalenko·P. Križan·R. Kroeger·P. Krokovny·T. Kuhr·M. Kumar·K. Kumara·A. Kuzmin·Y. -J. Kwon·K. Lalwani·M. Laurenza·S. C. Lee·C. H. Li·L. K. Li·L. Li Gioi·J. Libby·K. Lieret
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Abstract

Using a data sample of 980~fb$^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we present evidence for the $\Omega(2012)^-$ in the resonant substructure of $\Omega_{c}^{0} \to \pi^+ (\bar{K}\Xi)^{-}$ ($(\bar{K}\Xi)^{-}$ = $K^-\Xi^0$ + $\bar{K}^0 \Xi^-$) decays. The significance of the $\Omega(2012)^-$ signal is 4.2$\sigma$ after considering the systematic uncertainties. The ratio of the branching fraction of $\Omega_{c}^{0} \to \pi^{+} \Omega(2012)^- \to \pi^+ (\bar{K}\Xi)^{-}$ relative to that of $\Omega_{c}^{0} \to \pi^{+} \Omega^-$ is calculated to be 0.220 $\pm$ 0.059(stat.) $\pm$ 0.035(syst.). The individual ratios of the branching fractions of the two isospin modes are also determined, and found to be ${\cal B}(\Omega_{c}^0 \to \pi^+ \Omega(2012)^-) \times {\cal B}(\Omega(2012)^- \to K^-\Xi^0)/{\cal B}(\Omega_{c}^0 \to \pi^+ K^- \Xi^0)$ = (9.6 $\pm$ 3.2(stat.) $\pm$ 1.8(syst.))\% and ${\cal B}(\Omega_{c}^0 \to \pi^+ \Omega(2012)^-) \times {\cal B}(\Omega(2012)^- \to \bar{K}^0 \Xi^-)/{\cal B}(\Omega_{c}^0 \to \pi^+ \bar{K}^0 \Xi^-)$ = (5.5 $\pm$ 2.8(stat.) $\pm$ 0.7(syst.))\%.

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Belle Collaboration, Y. Li, S. S. Tang, S. Jia, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, M. Bessner, T. Bilka, J. Biswal, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. -C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -J. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, F. Di Capua, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, W. -S. Hou, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. -J. Jang, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, C. Kiesling, C. H. Kim, D. Y. Kim, K. -H. Kim, S. H. Kim, Y. -K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, A. Kuzmin, Y. -J. Kwon, K. Lalwani, M. Laurenza, S. C. Lee, C. H. Li, L. K. Li, L. Li Gioi, J. Libby, K. Lieret. 2021-06-02. Evidence for the decay $\Omega_{c}^{0} \to \pi^+\Omega(2012)^- \to \pi^+ (\bar{K}\Xi)^{-}$. https://doi.org/10.1103/physrevd.104.052005

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